Astria fireplaces GEMINICD40DEN, GEMINI40DEN, GEMINICD35DEN, GEMINI45DEP, GEMINI45DMP User Manual

Installation and Operation Instructions

CUS

P900285-01

Gemini™ Direct-Vent Gas Fireplaces

P/N 900285-01 REV. H 01/2017

Ce manuel est disponible en francais, simplement
en faire la demande. Numéro de la pièce 900285-03.

Report No. F13-094

INSTALLER: Leave this manual with the appliance.
CONSUMER: Retain this manual for future
reference.

Models

Gemini33TMN
Gemini33TMP

Gemini33TEN
Gemini33TEP

Gemini33RMN
Gemini33RMP

Gemini33REN
Gemini33REP

GeminiCD35DEN

Gemini35DMN
Gemini35DMP

Gemini35DEN
Gemini35DEP

Gemini40DMN
Gemini40DMP

Gemini40DEN
Gemini40DEP

GeminiCD40DEN

Installateur : Laissez cette notice avec l’appareil.
Consommateur : Conservez cette notice pour
consultation ultérieure.

Gemini45DMN
Gemini45DMP

Gemini45DEN
Gemini45DEP

This appliance may be installed in an aftermarket permanently located, manufactured home (USA only)
or mobile home, where not prohibited by local codes. This appliance is only for use with the type of gas
indicated on the rating plate. This appliance is not convertible for use with other gases, unless a certified kit
is used.

Cet appareil peut installé dans une maison préfabriquée (mobile) déjà installée à demeure, si les réglements
locaux le permettent. Ce appareil doit être utilisé uniquement avec le type de gaz indiqué sure la plaque
signalétique. Cet appareil ne peut être converti à d’autres gaz, sauf si une trousse de conversion est utilsée.

WARNING:

FIRE OR EXPLOSION HAZARD
Failure to follow safety warnings exactly could
result in serious injury, death, or property damage.

- Do not store or use gasoline or other flammable
vapors and liquids in the vicinity of this or any
other appliance.

- WHAT TO DO IF YOU SMELL GAS

• Do not try to light any appliance.

• Do not touch any electrical switch; do not use
any phone in your building.

• Leave the building immediately.

• Immediately call your gas supplier from a neigh­bor’s phone. Follow the gas supplier’s instruc­tions.

• If you cannot reach your gas supplier, call the
fire department.

- Installation and service must be performed by
a qualified installer, service agency or the gas
supplier.

AVERTISSEMENT:
RISQUED’INDENDIE OU D’EXPLOSION

Le non-respect Des avertissements de sécurité
pourrait d’entraîner des blessures graves, la mort
ou des dommages matériels.

- Ne pas entreposer ni utilizer d’essence ni d’autres
vapeurs ou liquides inflammables dans le voisinage
de cet appareil ou de tout autre appareil.

- QUE FAIRE SI VOUS SENTEZ UNE ODEUR DE GAZ:

• Ne pas tenter d’allumer d’appareil.

• Ne touchez à aucan interrupteur. Ne pas vous servir
des téléphones se trouvant dans le bâtiment où
vous trouvez.

• Sortez immédiatement de bâtiment.

• Appelez immédiatement votre fournisseur de
gaz depuis un voisin. Suivez les instructions du
fournisseur.

• Si vous ne pouvez rejoindre le fournisseur de gaz,
appelez le service des incindies.

- L’installation et l’entretien doivent être assurés par
un installateur ou un service d’entretien qualifié
ou par le fournisseur de gaz.

Innovative Hearth Products
Gemini™ and GeminiCD Series Direct-Vent Gas Fireplaces

SAFETY AND YOUR FIREPLACE

See attached color flyer for proper color representation

General Information

900285-01 01/2017

DANGER

A barrier designed to reduce the risk of burns from the hot viewing glass is pro­vided with this appliance and shall be installed for the protection of children and
other at-risk individuals.

Voir ci-joint tract pour une bonne représentation de la couleur

DANGER

L’écran pare-étincelles fourni avec ce foyer réduit le risque de brûlure en cas de
contact accidentel avec la vitre chaude et doit être installé pour la protection Des
enfants et Des personnes à risques.

HOT GLASS WILL

CAUSE BURNS.

DO NOT TOUCH GLASS

UNTIL COOLED.

NEVER ALLOW CHILDREN

TO TOUCH GLASS.

VITRE CHAUDE

RISQUE DE BRÛLURES.

NE TOUCHEZ PAS UNE VITRE

NON REFROIDIE.

NE LAISSEZ JAMAIS UN ENFANT

DE TOUCHER LA VITRE.

Vea el volante adjunto para la representación de color adecuado

PELIGRO

CAUSARÁ QUEMADURAS.

TOCAR EL VIDRIO CALIENTE.

LOS NIÑOS DEBEN NUNCA

Una barrera diseñada para reducir el riesgo de quemaduras desde la mirilla (vidrio)
caliente es proveida con este aparato y deberá instalarse para la protección de los
niños y otros individuos en riesgo.

2

EL VIDRIO CALIENTE

USTED DEBE NUNCA

TOCAR EL VIDRIO.

Innovative Hearth Products
Gemini™ and GeminiCD Series Direct-Vent Gas Fireplaces

General Information

900285-01 01/2017

Safety and Your

Fireplace

All parts of your

IHP fireplace get

EXTREMELY HOT!

 To prevent severe burns

and injuries, do Not
remove the barrier on the
appliance which prevents
direct contact with the
glass.

 Follow the safety instructions below

and be sure everyone in your household
understands this burn hazard:

• The surfaces on your fireplace get
EXTREMELY HOT!

• The glass on the front of the
fireplace reaches EXTREMELY HIGH
temperatures and can cause severe
burns if touched.

• Keep children away from an operating
fireplace. Closely supervise children
in any room where a fireplace is
operating to prevent contact with glass.

• Keep clothing, furniture, gasoline, and
other flammable liquids away from the
fireplace.

• Even after the gas is turned off,
fireplace surfaces remain extremely
hot.

 Be sure to attach the enclosed Safety-

in-Operation Warnings where you

turn on your fireplace, to help remind
everyone of the dangers associated with
high temperatures

 Read Important Safety Information

(Page 5)

.

(Page 47)

.

La sécurité et

votre foyer

Toutes les parties de votre

foyer IHP deviennent

EXTRÊMEMENT CHAUDES !

 Afin d’éviter les brûlures

graves ou les blessures,
ne pas retirer l’écran de
protection de la foyer qui
empêche tout contact
direct avec la vitre.

 Suivez les instructions de sécurité

ci-dessous et veillez à ce que tous
les membres de votre famille soient
conscients du danger de brûlure
encouru :

• Les surfaces de votre foyer deviennent
EXTRÊMEMENT CHAUDES !

• La vitre située à l'avant du foyer atteint
des températures EXTRÊMEMENT
ÉLEVÉES et peut causer de graves
blessures en cas de contact.

• Tenez les enfants à l'écart du foyer
lorsqu'il fonctionne. Surveillez
attentivement les enfants dans les
pièces où un foyer est utilisé afin
d'éviter qu'ils ne soient en contact avec
la vitre.

• Tenez tous les vêtements, les meubles,
l'essence et tout autre liquide
inflammable à l'écart du foyer.

• Même après fermeture du gaz, les
surfaces du foyer restent extrêmement
chaudes.

 Veillez à coller les Étiquettes de mise

en garde relatives à la sécurité
d'utilisation à l'endroit où vous

utilisez le foyer, pour rappeler à tous
les utilisateurs les dangers liés aux

températures élevées



Lisez L’information de sûreté

importante (Page 5)

(Page 47)

.

.

Seguridad y su

chimenea

¡Todas las partes de la

chimenea IHP se ponen

MUY CALIENTES!

Para evitar quemaduras y lesiones

graves, no quite el protector de malla
o guardia de seguridad que evita el
contacto directo con el vidrio.

 Siga las instrucciones de seguridad

a continuación y asegúrese de que
todos en su hogar sepan acerca de este
peligro de quemadura:

• ¡Las superficies de la chimenea se
ponen MUY CALIENTES!

• El vidrio delante de la
chimenea alcanza temperaturas
EXTREMADAMENTE ALTAS y puede
causar quemaduras graves si se toca.

• Mantenga a los niños alejados de
la chimenea en funcionamiento.
Supervise en forma cercana a los niños
en cualquier cuarto donde haya una
chimenea funcionando para impedir el
contacto con el vidrio.

• Mantenga la ropa, mobiliario, gasolina
y otros líquidos inflamables alejados
de la chimenea.

• Aún después de haber apagado el
gas, las superficies de la chimenea
permanecen extremadamente
calientes.

 Asegúrese de colocar las Etiquetas de

advertencia de seguridad de operación

en el lugar donde enciende la chimenea,
para que todos recuerden los peligros
asociados con las altas temperaturas

(Página 47)



Lea Información importante de

seguridad (Página 5).

.

[FRENCH][ENGLISH]

[SPANISH]

3

Innovative Hearth Products
Gemini™ and GeminiCD Series Direct-Vent Gas Fireplaces

General Information

900285-01 01/2017

Traditional - Driftwood Logs

THANK YOU FOR YOUR PURCHASE. WE APPRECIATE YOUR BUSINESS!

Please carefully read and follow all instructions in this manual. Pay special attention to all warnings and safety
information. Following these safety, care, and operation instructions will help ensure many years of dependable and
enjoyable service from your fireplace.

Please read and understand these instructions before installing,
operating, or servicing this product.

General Information

Safety and Your Fireplace...................................................................2

Important Safety Information ............................................................5

Fireplace Installation, Operation, and Maintenance Notices ............... 6

Packaging List ................................................................................... 8

Introduction ....................................................................................... 8

Gas Pressure ..................................................................................... 9

Requirements for the Commonwealth of Massachusetts ................10

Cold Climate Insulation .................................................................... 10

Manufactured Home Requirements ................................................. 11

Location ...........................................................................................11

Vent Termination Clearances ...........................................................12

Minimum Clearances to Combustibles ............................................14

Wall Finishes / Surrounds / Mantels ................................................15

Installation Preparation ....................................................................15

Installation

Installation Sequence ......................................................................16

Construct the Fireplace Framing ...................................................... 16

Prepare the Fireplace Top Spacers ...................................................18

Route the Gas Supply Line to the Fireplace .....................................18

Vent System Preparation .................................................................21

Install the Vent System ....................................................................25

Complete the Field Wiring ................................................................37

4

Contemporary

We recommend that our
gas hearth products be
installed and serviced by
professionals who are
certied in the U.S. by the
National Fireplace Institute®
(NFI) as NFI Gas Specialists.

Install the [Optional] Blower Kit after Installation in the Framing ..... 39

Connect the Gas Line ....................................................................... 40

Verify Proper Fireplace Operation ....................................................41

Optional: Install the Firebox Liners ..................................................42

Install the Logs, Volcanic Stone, and Glowing Embers or Glass

Media ..........................................................................................42

Install the Glass Door ......................................................................42

Adjust the Air Shutter to Ensure Proper Flame Appearance ............. 42

Install the Hood ...............................................................................43

Install the Finishing Materials .......................................................... 44

Attach the Safety-in-Operation Warnings.........................................44

Installing Batteries for Backup and Wall Switch ...............................44

Installation Accessories ................................................................... 48

Gas Conversion Kits ........................................................................50

Operation

Operation ......................................................................................... 51

Maintenance .................................................................................... 60

Accessory Components ................................................................... 63

Lighting Instructions .......................................................................67

Troubleshooting ...............................................................................73

Replacement Parts ..........................................................................75

Warranty ..........................................................................................79

Innovative Hearth Products
Gemini™ and GeminiCD Series Direct-Vent Gas Fireplaces

IMPORTANT SAFETY INFORMATION

General Information

900285-01 01/2017

Important Safety Informa­tion

1. WARNING: Do not operate appliance
with the glass front removed, cracked
or broken.

2. Do not use this appliance if any part
has been under water. Immediately
call a qualified service technician to in­spect the appliance and to replace any
part of the control system and any gas
control which has been under water.

3. Due to high temperatures, the appli­ance should be located out of traffic
and away from furniture and draperies.

4. Children and adults should be alerted
to the hazards of high surface tem­perature and should stay away to avoid
burns or clothing ignition.

5. Clothing or other flammable material
should not be placed on or near the
appliance.

6. Young children should be carefully
supervised when they are in the same
room as the appliance. Toddlers,
young children, and others may be sus­ceptible to accidental contact burns.
A physical barrier is recommended
if there are at-risk individuals in the
house. To restrict access to a fireplace
or stove, install an adjustable safety
gate to keep toddlers, young children,
and other at-risk individuals out of the
room and away from hot surfaces.

7. Any safety screen, guard or barrier
removed for servicing an appliance
must be replaced prior to operating
the appliance.

8. Installation and repair should be done
by a qualified service person. The ap­pliance should be inspected before use
and at least annually by a professional
service person. More frequent clean­ing may be required due to excessive
lint from carpeting, bedding material,
et cetera. It is imperative that control
compartments, burners, and circulat­ing air passageways of the appliance
be kept clean. See maintenance in­structions on Page 60.

L’information de sûreté
importante

1. AVERTISSEMENT. Ne pas utiliser l’appareil
si le panneau frontal en verre n’est pas en
place, est craqué ou brisé.

2. Ne pas se servir de cet appareil s’il a été
plongé dans l’eau, même partiellement.
Faire inspecter l'appareil par un technicien
qualifié et remplacer toute partie du systéme
de contrôle et toute commande qui ont été
plongées dans l'eau.

3. En raison des températures élevées,
l’appareil devrait être installé dans un en
droit où il y a peu de circulation et loin du
mobilier et des tentures.

4. Les enfants et les adultes devraient être
informés des dangers que posent les tem
pératures de surface élevées et se tenir à
distance afin d’éviter des brûlures ou que
leurs vêtements ne s’enflamment.

5. On ne devrait pas placer de vêtements
ni d’autres matières inflammables sur
l’appareil ni à proximité.

6. Les jeunes enfants devraient être surveillés
étroitement lorsqu’ils se trouvent dans la
même pièce que l’appareil. Les tout petits,
les jeunes enfants ou les adultes peuvent
subir des brûlures s’ils viennent en contact
avec la surface chaude. Il est recommandé
d’installer une barrière physique si des
personnes à risques habitent la maison.
Pour empêcher l’accès à un foyer ou à un
poêle, installez une barrière de sécurité
; cette mesure empêchera les tout petits,
les jeunes enfants et toute autre personne
à risque d’avoir accès à la pièce et aux
surfaces chaudes.

7. Tout écran ou protecteur retiré pour per
mettre l’entretien de l’appareil doit être
remis en place avant de mettre l’appareil
en marche.

8. L’installation et la réparation devrait être
confiées à un technicien qualifié. L’appareil
devrait faire l’objet d’une inspection par un
technicien professionnel avant d’être utilisé
et au moins une fois l’an par la suite. Des
nettoyages plus fréquents peuvent être
nécessaires si les tapis, la literie, et cetera
produisent une quantité importante de pous
sière. Il est essentiel que les compartiments
abritant les commandes, les brûleurs et les
conduits de circulation d’air de l’appareil
soient tenus propres. Voyez les instructions
d’entretien à la Page 60.

-

-

-

-

Información importante de
seguridad

1. ADVERTENCIA: No opere el artefacto con el
frente de vidrio quitado, agrietado o roto.

2. No use este artefacto si alguna de sus partes
ha estado bajo agua. Llame de inmediato
a un técnico de servicio calificado para
que inspeccione el artefacto y reemplace
cualquier parte del sistema de control y
cualquier control de gas que haya estado
bajo agua.

3. Debido a las altas temperaturas, el artefacto
debe situarse fuera de las áreas de tráfico y
lejos del mobiliario y cortinas.

4. Se debe alertar a los niños y adultos sobre
los peligros de las altas temperaturas en la
superficie y que se mantengan alejados para
evitar quemaduras o ignición de la ropa.

5. No debe colocarse ropa u otros materiales
inflamables sobre y cerca del artefacto.

6. Se debe supervisar de cerca a los niños
cuando estén en el mismo cuarto que el
artefacto. Los niños pequeños, los jóvenes
y otras personas pueden ser susceptibles
a quemaduras por contacto accidental. Se
recomienda instalar una barrera física si hay
personas en riesgo en la casa. Para restringir
el acceso a una chimenea o estufa, instale
una puerta de seguridad ajustable para
mantener a los niños pequeños, jóvenes y
otras personas en riesgo fuera del cuarto y
lejos de las superficies calientes.

7. Cualquier malla o resguardo de seguridad
quitado para dar servicio a un artefacto, debe
reinstalarse antes de operar el artefacto.

8. Una persona de servicio competente debe
realizar la instalación y reparación. Una
persona de servicio profesional debe
inspeccionar el artefacto antes de usar al
menos una vez por año. Se puede requerir
limpieza más frecuente debido a la pelusa
excesiva del alfombrado, del material de
cobijas, etc. Es imprescindible mantener
limpios los compartimientos de control, los
quemadores y los pasajes de circulación del
aire del artefacto. Ver las instrucciones de
mantenimiento en la página 60.

[English]

[French]

[Spanish]

5

Innovative Hearth Products
Gemini™ and GeminiCD Series Direct-Vent Gas Fireplaces

APPLIANCE INSTALLATION, SERVICE, AND MAINTENANCE NOTICES

WARNING

Improper installation, adjustment, alteration, service or maintenance can cause injury or
property damage. Refer to this manual. For assistance or additional information consult a
qualified installer, service agency or the gas supplier.

AVERTISSEMENT

Une installation, un réglage,une modification, une réparation ou un entretien mal effectué
peut causer des dommages matériels ou des blessures. Voir la notice de l’utilisateur qui
accompagne l’appareil. Pour de l’aide ou des renseignements supplémentaires, consultez
un installateur, un technicien agréé ou le fournisseur de gaz.

Only trim kit(s) supplied by the manufacturer shall be used in the installation of this fireplace.

Seules des portes certifiées pour cet appareil doivent être utilisées.

These appliances must not be connected to a chimney or flue serving a separate solid fuel
burning appliance.

General Information

900285-01 01/2017

Any change to this appliance and/or its operating controls is dangerous. Improper installation
or use of this appliance can cause serious injury or death from fire, burns, explosion or
carbon monoxide poisoning.

CARBON MONOXIDE POISONING: Early signs of carbon monoxide poisoning are similar to
the flu with headaches, dizziness and/or nausea. If you have these signs, obtain fresh air
immediately. Turn off the gas supply to the appliance and have it serviced by a qualified
professional, as it may not be operating correctly. Some people are more affected by carbon
monoxide than others, including pregnant women, people with heart or lung disease or
anemia, those under the influence of alcohol, and those at high altitudes.

Turn off gas and electrical power to the appliance and allow it to cool before cleaning or
servicing the appliance.

If the barrier becomes damaged, the barrier shall be replaced with the manufacturer’s barrier
for this appliance.

Si l’écran est endommagé, il doit être remplacé par celui fournit par le fabricant de cet
appareil.

For use with barrier(s) Part No(s). F1902 (33” Models), F1839 (35” Models), F1840 (40”
Models), and F1903 (45” Models). Follow installation instructions.

Reinstall any barrier removed before operating the appliance. The barrier is designed to
reduce the risk of burns from hot glass. Do not operate the appliance without the barrier
installed.

6

Innovative Hearth Products
Gemini™ and GeminiCD Series Direct-Vent Gas Fireplaces

APPLIANCE OPERATION NOTICES

These fireplaces are vented gas appliances. Do not burn wood or other material in these
appliances.

These appliances are designed to operate on natural gas or propane gas only. The use of
other fuels or combinations of fuels will degrade the performance of this system and may be
dangerous.

Provide adequate clearances around air openings and adequate accessibility clearance for
service and proper operation. Never obstruct the front openings of the appliance.

These appliances are designed as supplemental heaters. Therefore, it is advisable to have an
alternate primary heat source when installed in a dwelling.

WARRANTY INFORMATION

Your gas appliance is covered by a limited lifetime warranty. You will find a copy of the
warranty accompanying this manual. Please read the warranty to be familiar with its
coverage.

General Information

900285-01 01/2017

Retain this manual. File it with your other documents for future reference.

Failure to comply with the installation and operating instructions provided will result in an
improperly installed and operating appliance, voiding its warranty.

Do not attempt to alter or modify the construction of the appliance or its components. Any
modification or alteration may void the warranty, certification, and listings of this unit.

IMPORTANT SAFETY AND WARNING INFORMATION

Hot while in operation. Do not touch. Severe Burns may result. Keep children, clothing
furniture, gasoline and other liquids having flammable vapors away.

L’appareil est chaud lorsqu’il fonctionne. Ne pas toucher l’appareil. Risque de brûlures
graves. Surveiller les enfants. Garder les vêtements, les meubles, l’essence ou autres
liquides produisant des vapeur inflammables loin de l’appareil.

CAUTION

ATTENTION

7

Innovative Hearth Products
Gemini™ and GeminiCD Series Direct-Vent Gas Fireplaces

INSTALLATION

PACKAGING

All models include

The assembled vented gas fireplace heater is packaged with:

• Literature Kit (envelope in bottom compartment containing Installation and Operation Instructions (this manual),
Hot Glass Safety Flyer, and Safety-In-Operation Warning Labels)

• U-Shaped Vent Restrictor (attached to Literature Kit envelope)

• Hood (Inside firebox, Traditional Models)

• Log Set (Traditional Fireplaces, in firebox) or Glass Media (Contemporary Fireplaces)

• Volcanic Stone—1 bag (in bottom compartment, Traditional Models)

• Glowing Embers—1 bag (in bottom compartment, Traditional Models)

• 1 Non-combustible board, 2 side brackets and 1 center bracket

INTRODUCTION

These vented gas fireplace heaters are sealed combustion, air-circulating gas fireplaces designed for residential and
commercial applications.

Millivolt fireplaces have a millivolt gas control valve with piezo ignition system. If a blower will be installed, electrical
power must be provided at the time of fireplace installation.

Electronic fireplaces are designed with an electronic intermittent pilot ignition system. External electrical power is
required to operate these units. In the event of a power outage, four (4) AA batteries (in battery holder) provide
backup power for fireplace operation. Battery backup will not operate optional/standard blower. Traditional units
require an additional four (4) AA batteries to provide power to the split-flow system.

General Information

900285-01 01/2017

NOTE: Installation and repair should be done by a qualified service person. The fireplace should be inspected before
use and at least annually by a professional service person. More frequent cleaning may be required due to excessive
lint from carpeting, bedding material, etcetera. It is imperative that control compartments, burners and circulating air
passageways of the fireplace be kept clean.

Remarqué : L’installation et la réparation devrait être confiées à un technicien qualifié. L’appareil devrait faire
l’objet d’une inspection par un technicien professionnel avant d’être utilisé et au moins une fois l’an par la suite.
Des nettoyages plus fréquents peuvent être nécessaires si les tapis, la literie, et cetera produisent une quantité
importante de pous-sière. Il est essentiel que les compartiments abritant les commandes, les brûleurs et les
conduits de circulation d’air de l’appareil soient tenus propres.

NOTE: Diagrams and illustrations are not necessarily shown to scale.

Approved Vent Components

These fireplaces are designed, tested and listed for operation and installation with the following vent components
only:

• Secure Vent® Direct-Vent System Components,

• Secure Flex® Flexible Vent Components, and

• Z-FLEX® Model GA Venting Systems listed to UL1777 and ULCS635 manufactured by Flexmaster Canada
Limited.

Use only the correct size venting (4-1/2” inner and 7-1/2” outer).
These approved vent system components are labeled for identification. DO NOT use any other manufacturer’s vent

components with these fireplaces.

Codes and Standards

These fireplaces comply with National Safety Standards and are tested and listed by PFS Corporation (Report No.
F13-094) to ANSI Z21.88 (in Canada, CSA-2.33), and CAN/CGA-2.17-M91 in both USA and Canada, as vented gas
fireplace heaters.

These fireplaces are listed for installation in bedrooms and manufactured homes.
The installation must conform to local codes or, in the absence of local codes, with the National Fuel Gas Code, ANSI

Z223.1/NFPA 54—latest edition (In Canada, the current CAN/CGA-B149.1 installation code).
The fireplace, when installed, must be electrically grounded and wired in accordance with local codes or, in the

absence of local codes, with the National Electrical Code, ANSI/NFPA 70—latest edition, or the Canadian Electrical
Code, CSA C22.1—latest edition.

8

Innovative Hearth Products
Gemini™ and GeminiCD Series Direct-Vent Gas Fireplaces

BTU Input

Table 1 - Input Rate (BTU/HR), Gas Valves

Models

33” Models 14,000 10,500 13,000 9,500
35” Models 16,000 11,000 15,000 11,000
40” Models 20,000 14,000 19,000 14,000†
45” Models 21,500 13,500 21,500 13,500

† 12,000 in Ecoflow Models

Table 2 - Thermal Efficiency (%)

Model

33” Models 61 57 61 60
35” Models 61 58 61 60
40” Models 61 58 61 60
45” Models 66 58 66 60

* AFUE is a measurement of the US Department of Energy, ** P4 (EnerGuide) is a measurement of the Canadian Office of Energy Efficiency.
Efficiencies are based on Normal input operation.

General Information

900285-01 01/2017

Natural Gas Propane Gas

High Rate Low Rate High Rate Low Rate

Millivolt Electronic

AFUE * P4 ** AFUE * P4 **

Gas Pressure

Table 3 - Inlet Gas Supply Pressure

Fuel Minimum Maximum

Natural Gas 5” WC / (1.25 kPa) 10.5” WC / (2.61 kPa)

Propane 11.0” WC / (2.74 kPa) 13.0” WC / (3.23 kPa)

Table 4 - Manifold Gas Supply Pressure

Fuel Pressure

Natural Gas 3.5” WC / (0.87 kPa)

Propane 10.0” WC / (2.49 kPa)

Test gauge connections are provided on the front of the millivolt and electronic gas control valve (identified IN for the
inlet and OUT for the manifold side). The control valves have a 3/8” (10 mm) NPT thread inlet and outlet side of the
valve (Figures 1 and 2).

Figure 1 - Millivolt Gas Valve

Figure 2 - Electronic Gas Valves

SIT

Ecoflow

Propane tanks are at pressures that will cause damage to valve components. Verify that the tanks have step down
regulators to reduce the pressure to safe levels.

The appliance and its appliance main gas valve must be disconnected from the gas supply piping system during
any pressure testing of that system at test pressures in excess of 1/2 psi (3.5 kPa).

The appliance must be isolated from the gas supply piping system by closing its equipment shutoff valve during
any pressure testing of the gas supply piping system at test pressures equal to or less than 1/2 psi (3.5 kPa).

9

Innovative Hearth Products
Gemini™ and GeminiCD Series Direct-Vent Gas Fireplaces

Orifice Sizes—Sea Level to High Altitude

These fireplaces are tested and approved for installation at elevations of 0–4500 ft (0–1372 m) above sea level
using the standard burner orifice sizes (Table 5). For elevations above 4500 ft, contact your gas supplier or qualified
service technician.

Table 5 - Burner Orifice Sizes, Elevation 0–4500 ft ( 0–1372 m)

General Information

900285-01 01/2017

Model

33” Models #49 (0.073”)* #57 (0.043”)*
35” Models #48 (0.076”)* #56 (0.046”)*
40” Models #44 (0.086”)* #55 (0.052”)*
45” Models #43 (0.089”)* #54 (0.055”)*

* Standard size installed at factory

Deration

At elevations above 4500 ft, the amount of BTU fuel value delivered must be reduced by either:

• Using gas that has been derated by the gas company.

• Changing the burner orifice to a smaller size as regulated by the local authorities having jurisdiction and by the
(USA) National Fuel Gas Code NFPA 54/ANSI Z223.1—latest edition or, in Canada, the CAN/CGA-B149.1 codes—
latest edition.

NOTE: Flame breadth, height and width will diminish 4% for every 1,000 ft of altitude.

IN CANADA—CAN/CGA-2.17-M91 (HIGH ALTITUDE):
THE CONVERSION SHALL BE CARRIED OUT BY A MANUFACTURER’S AUTHORIZED REPRESENTATIVE,

IN ACCORDANCE WITH THE REQUIREMENTS OF THE MANUFACTURER, PROVINCIAL OR TERRITORIAL
AUTHORITIES HAVING JURISDICTION AND IN ACCORDANCE WITH THE REQUIREMENTS OF THE CAN/
CGA-B149.1 OR CAN/CGA-B149.2 INSTALLATION CODES.

COMMONWEALTH OF MASSACHUSETTS REQUIREMENTS

Natural Gas

drill size

Propane
drill size

These appliances are approved for installation in the US state of Massachusetts if the following additional
requirements are met:

• Install this appliance in accordance with Massachusetts Rules and Regulations 248 C.M.R. Sections 4.00
through 8.00.

• Installation and repair must be done by a plumber or gas fitter licensed in the Commonwealth of Massachusetts.

• The flexible gas line connector used shall not exceed 36 inches (92 centimeters) in length.

• The individual manual shut-off must be a T-handle type valve.

Massachusetts Horizontal Vent Requirements

In the Commonwealth of Massachusetts, horizontal terminations installed less than seven (7) feet above the finished
grade must comply with the following additional requirements:

• A hard wired carbon monoxide detector with an alarm and battery back-up must be installed on the floor level
where the gas fireplace is installed. The carbon monoxide detector must comply with NFPA 720, be ANSI/UL
2034 listed and be ISA certified.

• A metal or plastic identification plate must be permanently mounted to the exterior of the building at a minimum height
of eight (8) feet above grade and be directly in line with the horizontal termination. The sign must read, in print size no
less than one-half (1/2) inch in size, GAS VENT DIRECTLY BELOW. KEEP CLEAR OF ALL OBSTRUCTIONS.

COLD CLIMATE INSULATION

For cold climate installations, seal all cracks around your fireplace with noncombustible material and wherever cold
air could enter the room. It is especially important to insulate outside chase cavity between studs and under floor on
which fireplace rests, if floor is above ground level. Gas line holes and other openings should be caulked or stuffed
with unfaced fiberglass insulation.

NOTE: Do not use loose, or blown-in insulation in the cavity surrounding the fireplace.
If the fireplace is being installed on a cement slab in cold climates, a sheet of plywood or other raised platform can

be placed underneath to prevent conduction of cold transferring to the fireplace and into the room. It also helps to
seal inside surfaces and tape for maximum air tightness and caulk firestops.

10

Innovative Hearth Products

(Rear Vent Application)

VERTICAL VENT

(Rear Vent Application without a chase)

HORIZONTAL VENT

Gemini™ and GeminiCD Series Direct-Vent Gas Fireplaces

MANUFACTURED HOME REQUIREMENTS

This appliance may be installed in an aftermarket, permanently located, manufactured home (USA only) or mobile
home, where not prohibited by local codes.

Cet appareil peut être installé dans une maison préfabriquée (mobile) déjà installée à demeure si les règlements
locaux le permettent.

This appliance is only for use with the type of gas indicated on the rating plate. This appliance is not convertible for
use with other gases, unless a certified kit is used.

Cet appareil doit être utilisé uniquement avec le type de gaz indiqué sur la plaque signalétique. Cet appareil ne
peut être converti à d’autres gaz, sauf si une trousse de conversion est utilisée.

Ensure that the cross members are not cut or weakened during installation. The structural
integrity of the manufactured home floor, wall, and ceiling / roof must be maintained.

This appliance must be grounded to the chassis of the manufactured home in accordance
with local codes or in the absence of local codes, with the National Electrical Code ANSI /
NFPA 70—latest edition or the Canadian Electrical Code CSA C22.1—latest edition.

General Information

900285-01 01/2017

CAUTION

CAUTION

LOCATION

In selecting the location, the aesthetic and functional use of the fireplace are primary concerns. However, vent
system routing to the exterior and access to the fuel supply are also important.

Due to high temperatures, the fireplace should be located out of traffic and away from furniture and draperies.

En raison des températures élevées, l’appareil devrait être installé dans un endroit où il y a peu de
circulation et loin du mobilier et des tentures.

The location should also be free of electrical, plumbing or other heating/air conditioning ducting.
These direct-vent fireplaces are uniquely suited for installations requiring a utility shelf positioned directly above the

fireplace. Utility shelves like these are commonly used for locating television sets and decorative plants.

Be aware that this is a heat producing fireplace. Objects placed above the unit are exposed to elevated temperatures.
Do not insulate the space between the fireplace and the area above it.

The minimum height from the base of the fireplace to the underside of combustible materials used to construct a
utility shelf in this fashion is shown in Table 9.

Figure 3 - Typical Locations and Venting

Top Vent

Top Vent

Rear Vent

Top Vent

Rear Vent

Horizontal Vent

(Rear Vent with chase)

Horizontal Vent

(Rear Vent without chase)

Recessed

Installation

Top Vent

Top Vent Top Vent

Vertical Vent

(Rear Vent)

Horizontal Vent

(Top Vent)

Vertical Vent

(Top Vent)

11

Innovative Hearth Products

12

X

Roof pitch is X/12

2 ft

minimum

2 ft minimum

Lowest

discharge

opening

H*

*H = minimum height from roof to

lowest discharge opening of vent

Horizontal overhang

Vertical
wall

Vent

termination

Storm collar

Concentric

vent pipe

Flashing

1” (26 mm) minimum
clearance to combustibles

TERMINATION HEIGHTS FOR VENTS ABOVE

FLAT OR SLOPED ROOFS

Gemini™ and GeminiCD Series Direct-Vent Gas Fireplaces

VENT TERMINATION CLEARANCES

These instructions should be used as a guideline and do not supersede local codes in any way. Install venting
according to local codes, these instructions, the current National Fuel Gas Code (ANSI Z223.1/NFPA 54) in the USA or
the current standards of CAN/CGA-B149.1 in Canada.

Vertical Vent Termination Clearances

Terminate multiple vent terminations according to the installation codes listed above and Figure 4.

Figure 4 - Multiple Terminations

General Information

900285-01 01/2017

12”

(305 mm)

minimum

6”

(153 mm)

Terminate single vent caps relative to building components according to Table 6 and Figure 4.

Table 6 - Termination Heights for Vents above Flat or Sloped Roofs (NFPA 54 / ANSI Z223.1)—Gas Vent Rule

Roof Pitch Termination Height *

Flat to 6/12 1.0 ft (0.3 m)
6/12 to 7/12 1.25 ft (0.38 m)
7/12 to 8/12 1.5 ft (0.46 m)
8/12 to 9/12 2.0 ft (0.61 m)

9/12 to 10/12 2.5 ft (0.76 m)
10/12 to 11/12 3.25 ft (0.99 m)
11/12 to 12/12 4.0 ft (1.22 m)
12/12 to 14/12 5.0 ft (1.52 m)
14/12 to 16/12 6.0 ft (1.83 m)
16/12 to 18/12 7.0 ft (2.13 m)
18/12 to 20/12 7.5 ft (2.29 m)
20/12 to 21/12 8.0 ft (2.44 m)

Horizontal Vent Termination Clearances

12

The horizontal vent termination must have a minimum of 6” (152 mm) clearance to any overhead combustible
projection of 2-1/2” (64 mm) or less (Figure 5). For projections exceeding 2-1/2” (64 mm) (Figure 5). For additional
vent location restrictions refer to Table 7.

All horizontal terminations may be located as close as 6” (152mm) to any (non-combustible and combustible)
exterior sidewall. This distance may be decreased to 2” (51mm) for noncombustible exterior sidewalls with all
approved terminations (Pages 48-49).

Figure 5 - Horizontal Vent Termination Clearances

Combustible projection

2-1/2” or less in length

Combustible projection

greater than 2-1/2” in length

Ventilated

soffit - 18”

(457 mm)

Unventilated

soffit - 12”

(305 mm)

Termination kit

6”

(152)

6”

*

Termination kit**

* 10” to center of termination for H1968
** Use 6-1/2” from center of termination for

all horizontal terminations applicable.

Innovative Hearth Products

(TERMINATION PROHIBITED)

Inside Corner

Balcony with No Side

Gemini™ and GeminiCD Series Direct-Vent Gas Fireplaces

Table 7 - Horizontal vent termination clearances for buildings with combustible and noncumbustible exteriors

Outside Corner Recessed Location

D

E

V

B

L

C

F

V

B

TERMINATION CAP

V

Fixed

Closed

Openable

V

Openable

V

B

A

AIR SUPPLY INLET

X

Fixed

Closed

J

B

V

B

X

G

GAS METER RESTRICTED AREA

A Clearance above grade, veranda, porch, desk, or balcony 12” (300 mm) ** 12” (300 mm) *
B Clearance to window or door that may be opened 6” (150 mm)

C Clearance to permanently closed window 9” (229 mm)

D Vertical clearance to ventilated soffit located above the

termination within a horizontal distance of 18” (458 mm)

E Clearance to unventilated soffit 12” (305 mm) 12” (305 mm)

See Table 6

H

G

V

V

F

I

G

G

M

V

K

V

G

V

X

A

WallVBalcony with Perpendicular Side Wall

M

M

V

U.S. Installation ** Canadian Installation *

6” (150 mm)

for fireplaces < 10,000 Btu/h (3 kW),
9” (230 mm)

for fireplaces > 10,000 Btu/h (3 kW), and < 50,000 Btu/h (15

for fireplaces < 10,000 Btu/h (3 kW),
12” (300 mm)

for fireplaces > 10,000 Btu/h (3 kW)

kW),
12” (300 mm)

for fireplaces > 50,000 Btu/h (15 kW) **

12” (305 mm)

recommended to prevent window condensation

recommended to prevent window
condensation

18” (458 mm) 18” (458 mm)

General Information

900285-01 01/2017

P

N

Q

O

V

F Clearance to outside corner 5” (127 mm)

minimum

5” (127 mm)
minimum

G Clearance to inside corner 6” (152 mm) minimum 6” (152 mm) minimum
H Clearance to each inside of center line extended above

meter / regulator assembly

36” (910 mm)
within a height of 15 ft above the meter / regulator assembly **

36” (910 mm)
within a height of 15 ft above the meter /
regulator assembly *

I Clearance to service regulator vent outlet 36” (910 mm)** 36” (910 mm)*

J Clearance to nonmechanical air supply inlet to building or

the combustion air inlet to any other fireplace

6” (150 mm)
for fireplaces < 10,000 Btu/h (3 kW),

9” (230 mm)
for fireplaces > 10,000 Btu/h (3 kW) and < 50,000 Btu/h (15 kW),

6” (150 mm)
for fireplaces < 10,000 Btu/h (3 kW),

12” (300 mm)
for fireplaces > 10,000 Btu/h (3 kW)

12” (300 mm)
for fireplaces > 50,000 Btu/h (15 kW)**

K Clearance to a mechanical air supply inlet 36” (910 mm) above if within 10 ft (3 m) horizontally ** 72” (1830 mm) *

L Clearance above paved sidewalk or paved driveway located

84” (2130 mm) ‡ 84” (2130 mm) ‡

on public property

M Clearance under veranda, porch, deck or balcony 12” (300 mm) *‡ 12” (300 mm) *‡

N Depth of alcove (maximum) 72” (1830 mm) ** 72” (1830 mm) *
O Clearance to termination (alcove) 6” (15.2 mm) ** 6” (15.2 mm)*
P Width of alcove (minimum) 36” (910 mm) ** 36” (910 mm) *
Q Clearance to combustible above (alcove) 18” (457 mm) ** 18” (457 mm) *

*

In accordance with the current CAN/CGA-B149.1 National Gas And Propane Installation Code

**

In accordance with the current ANSI Z223.1/NFPA 54 National Fuel Gas Codes

‡

A vent shall not terminate directly above a sidewalk or paved driveway which is located between two single family dwellings and serves both dwellings

*‡

Only permitted if veranda, porch, deck, or balcony is fully-open on a minimum two sides beneath the floor

13

Innovative Hearth Products
Gemini™ and GeminiCD Series Direct-Vent Gas Fireplaces

MINIMUM CLEARANCES TO COMBUSTIBLES

Fireplace And Vent Clearances

The fireplace is approved with zero clearance to combustible materials on all sides (Table 8), with the following
exception: The unit may not be recessed (allowance made for mantel legs / side trim in (Figure 6). When the unit is
installed with one side flush with a wall, the wall on the other side of the unit must not extend beyond the front edge
of the unit (Figure 6).

Table 8 - Minimum Clearances *

From Bottom of Unit to Ceiling 64” (1626 mm)

Front Service Clearance—

clearance immediately in front of viewing area(s)

Back

Sides

Top Standoffs 0” (0 mm) to top standoffs

Floor 0” (0 mm)

Vent

1” (26mm) to wrapper

0” (0 mm) to Spacers

1/2” (13 mm) to wrapper
0” (0 mm) to Spacers **

3” (77 mm)—Top *

1” (26 mm)—Sides and Bottom

36” (914 mm)

General Information

900285-01 01/2017

The fireplace must be mounted on a fully supported base extending the full width and depth of the unit. The fireplace
may be located on or near conventional construction materials. However, if installed on combustible materials, such
as carpeting, vinyl tile or other combustible material other than wood flooring, the appliance shall be installed on a
metal or wood panel extending the full width and depth of the appliance.

Hearth Extension

A hearth extension is not required with this fireplace. If a hearth extension is used, do not block the lower control
compartment door. Any hearth extension used is for appearance only and does not have to conform to standard
hearth extension installation requirements.

Shelf Height

To provide for the lowest possible shelf surface, use the rear vent model. For top vent models, the venting attached
to the top vent should be routed in a way to minimize obstructions to the space above the fireplace. Do not insulate
the space between the fireplace and the area above it (Table 9). The minimum height from the base of the fireplace
to the underside of combustible materials used to construct a utility shelf in this fashion is shown in Table 9.

Table 9 - Combustible Shelf Height—Top Vent

* 3” (77 mm) above any horizontal/inclined vent component.
** See Page 21 for clearance requirements to the nailing flange located at each side of the unit and any screw heads adjacent to it.

Top Vent with one 90° Elbow

Model

Secure Vent

33” Models 44” (1118 mm)* 46” (1168 mm)* 39” (990 mm)**
35” Models 47” (1194 mm)* 49” (1245 mm)* 41” (1042 mm)**
40” Models 52” (1321 mm)* 54” (1372 mm)* 46” (1169 mm)**
45” Models 52” (1321 mm)* 54” (1372 mm)* 46” (1169 mm)**

®

Secure Flex®

(flex elbow)

Alternative Rear Vent

applications

Secure Vent

®

Shelf Height

(see table)

No com­bustibles or
insulation
in the
shaded area
between the
appliance
and the
shelf above
it.

14

* Includes 3” clearance to combustibles (required above vent components)
** In alternative, Rear Vent applications, Top Vent will be sealed as detailed in the

Installation and Operation manual.

Innovative Hearth Products

mantel legs may

At 6 in. minimu
side wall clearance,
a combustible wal
can project to an
length

Gemini™ and GeminiCD Series Direct-Vent Gas Fireplaces

General Information

900285-01 01/2017

Figure 6 - Combustible Side Clearances

At 6” minimum
side wall
clearance, a
combustible wall
can project to any
length.

m

Top View of

l

y

.

o

o

45

45

Top View of

3 1/2 in.

3-1/2”

(89 mm)

(89 mm)*

Fireplace

Fireplace

Combustible materials

Combustible Materials

allowed in shaded area

Allowed In Shaded Area

“Safe Zone”.

“Safe Zone”

Combustible Walls

Combustible walls

shown in dark gray

shown in dark gray

Combustible

Combustible mantel

project beyond either side

legs may project

of the fireplace opening

beyond either side of

as long as they are kept

the fireplace opening

within the shaded area

as long as they are kept

illustrated here.

within the shaded area
illustrated here.

6”

(152 mm)
* 6” (152 mm) in 35” and 40” Contemporary units

Wall Finishes / Surrounds / Mantels

NOTE: Combustible wall finish materials and/or surround materials must not be allowed to encroach the area defined
by the fireplace front face (black sheet metal). Never allow combustible materials to be positioned in front of or
overlapping the fireplace face (Figure 40).

Non-combustible materials, such as surrounds and other fireplace trim, may be installed on the fireplace face, but they
must not cover any portion of the removable glass panel or control compartment.

Vertical installation clearances to combustible mantels vary according to the depth of the mantel (Figure 7). Mantels
constructed of non-combustible materials may be installed at any height above the fireplace opening. However, do
not allow anything to hang below the fireplace hood.

Minimum clearance requirements include any projections such as shelves, window sills, mantels, etc. above the
fireplace.

Figure 7 - Mantel Height

12

(305)

Mantel depth

(203)

10

(254)

8

6

(152)

20 (508)

18 (457)

16 (406)

14 (356)

12 (305)

10 (254)

in. (mm)

Traditional

4

(102)

2

(51)

Hood

Fireplace

25 (635)

23 (584)
21 (533)

19 (483)

17 (432)

15 (381)

12

(305)

10

(254)

Contemporary

Mantel depth

8

(102)

6

(203)

(152)

4

2

(51)

Fireplace
Opening

Fireplace

INSTALLATION PREPARATION

NOTE: To avoid heat-related finish damage, we recommend the use of high temperature paint (rated 175° F or higher) on

the underside of the mantel.

The fireplace is shipped with all gas controls and components installed and pre-wired. Before installing the fireplace,
follow these steps:

1. Remove the shipping carton, and retain the front of the carton (used to protect the fireplace during construction).

2. Remove the shipping pad, exposing the front glass door.

3. Remove the glass door (Page 58).
NOTE: Place the glass door on the shipping carton to protect its surface.

15

Innovative Hearth Products
Gemini™ and GeminiCD Series Direct-Vent Gas Fireplaces

INSTALLATION SEQUENCE

The typical sequence of installation is outlined below; however, each installation is unique and may result in
variations to the steps described.

See the pages referenced in the following steps for detailed instructions.

Framing

1. Construct the Fireplace Framing (Page 16).

2. Prepare the Fireplace Top Spacers (Page 18).

3. Route the Gas Supply Line to the Fireplace (Page 18).

4. Determining Vent Setup in the Combination Venting Unit (Page 19)

5. Installing Metal, Non-Combustible Front Standoff (Page 19)

6. Rough in the Electrical Supply, if Needed (Page 20).

7. Install the [Optional] Blower Kit before Installation in the Framing (Page 20).

Venting

8. Place the Fireplace in the Framing and Secure (Page 21).

9. Select a Horizontal or Vertical Vent System (Page 21).

10. Install the Vent Restrictor (if necessary) (Page 22).

11. Install the Vent System (Page 25).

Electrical Connection

12. Complete the Field Wiring (Page 37).

13. Install the [Optional] Blower Kit after Installation in the Framing (Page 39).

Gas Connection

14. Connect the Gas Line (Page 40).

15. Verify Proper Fireplace Operation (Page 41).

Finishing

16. Optional: Install the Firebox Liners (Page 42).

17. Install the Logs, Volcanic Stone, and Glowing Embers or Glass Media (Page 42).

18. Install the Glass Door (Page 42).

19. Adjust the Air Shutter to Ensure Proper Flame Appearance (Page 42).

20. Install the Hood in Traditional Fireplaces (Page 43).

21. Reinstall the Included Barrier (Page 44).

22. Install the Finishing Materials and Facade in Contemporary Fireplaces (Page 44).

23. Attach the Safety-in-Operation Warning Labels (Page 47).

24. Installing Batteries for Backup and Wall Switch (Page 44).

Installation

900285-01 01/2017

1. Construct the Fireplace Framing

1. Frame the fireplace as illustrated in Table 10. For corner framing installations, use Table 11. All framing details

must allow for a minimum clearance to combustible framing members as shown in Table 8.

2. If the fireplace is to be elevated above floor level, a solid continuous platform must be constructed below the fireplace.
NOTE: Headers may be in direct contact with the fireplace top standoff spacers when they are bent up vertically,

maintaining the 4” clearance to the fireplace top, but must not be supported by them or notched to fit around them.
All construction above the fireplace must be self-supporting. DO NOT use the fireplace for structural support.

NOTE: For contemporary models, leave a minimum of 6” clearance to any side wall for proper facade installation and
fit.

16

Innovative Hearth Products
Gemini™ and GeminiCD Series Direct-Vent Gas Fireplaces

Installation

900285-01 01/2017

Table 10 - Fireplace Framing Specifications

Model A * B C D E

33” Models

35” Models

40” Models

45” Models

33-3/4

(857)

35-3/8

(899)

40-3/8
(1026)

45-3/8
(1153)

34-1/4

(845)

36-1/4

(895)

41-1/4
(1048)

41-1/4
(1048)

36-7/8

(930)

38-3/4

(984)

43-3/4
(1111)

43-3/4
(1111)

C = Minimum height of top vent installations

14-1/2

(368)

18

(447)

18

(447)

18

(447 )

19-5/8

(499)

23-3/8

(594)

28-1/4

(717)

28-1/4

(717)

NOTE: Dimension “D” is the
required framing depth when
the finish material (drywall)
thickness is 1/2” (13mm).

Vent Framing—Top Vent

with One 90° Elbow

B

E = Minimum height of rear vent installations

* Minimum opening size; additional 1/8” per side is recommended.
NOTE: Framing specifications do NOT apply for flexible venting.

When using flexible venting, refer to the kit requirements for framing
specifications.

Inches

(millimeters)

Table 11 - Fireplace Framing Specifications—Corner Installation with Horizontal Termination

Model A B C D E F

33”

35”

40”

45”

33-3/4

(857)

35-3/8

(899)

40-3/8
(1025)

45-3/8
(1153)

51-1/4
(1302)

59-1/2
(1511)

63-7/8
(1622)

70-3/8
(1788)

36-1/4

(921)

42-1/8
(1070)

45-3/8
(1153)

49-3/4
(1264)

25-5/8

(651)

30-1/4

(768)

33-1/4

(845)

35-1/4

(895)

12-1/8

(308)

14-1/4

(362)

15-7/8

(403)

17-1/2

(445)

5-1/2
(140)

6-5/8
(168)

8-1/2
(216)

10-1/4

(260)

C

1/2 A

Framing

10-1/2

construction to be

(267)

2 x 4, or larger.

7 (178)

5-1/8
(130)

C

E

D

A

E

F

12-1/8

(308)

D

7
(178)

A

B

Back wall of chase/enclosure (including finishing materials)

Inches
(millimeters)

Table 12 - Fireplace Specifications

NOTE: When finishing the area around the hood, 5/8” clearance above hood is required for hood installation.

F

G

I

K

Top View Front View

Model A B C D (door) E F G H I J K

33” Models 30-1/8 (765) 26-1/4 (667) 18-3/8 (467) 30-1/2 (775) 33-5/8 (854) 21-7/8 (556) 11 (279) 31 (787) 5-3/4 (146) 14 (356) 8-1/2 (207)

35” Models 32-1/8 (816) 28-3/4 (730) 22-1/4 (565) 32-3/8 (822) 35-1/4 (895) 25 (635) 12-1/2 (317) 32-7/8 (835) 6-7/8 (175) 17 (432) 10-1/8 (257)

40” Models 37-1/8 (943) 33-1/4 (845) 27-1/4 (692) 37-3/8 (949) 40-1/4 (1022) 30 (762) 15 (381) 37-7/8 (962) 6-7/8 (175) 17 (432) 10-1/8 (257)

45”Models 37-1/8 (943) 33-1/4 (845) 27-1/4 (692) 42-3/8 (1076) 45-1/4 (1149) 35 (889) 17-1/2 (445) 42-7/8 (1089) 6-7/8 (175) 17 (432) 10-1/8 (257)

A

E

C

D

H

B

Blower

access panel

J K

Hood

Junction

box access

Gas line

access

Left Side View Right Side View

17

Innovative Hearth Products
Gemini™ and GeminiCD Series Direct-Vent Gas Fireplaces

2.

Prepare the Fireplace Top Spacers

1. The two (2) 4” standoff spacers on top of the fireplace cabinet are shipped flat. Remove the screw adjacent to

the detached end (Figure 8).

2. Bend the standoffs as shown (Figure 9):

3. Align the hole in the standoff with the hole in the fireplace top, and secure with the screw that was removed in
Step 1 (Figure 9).

Figure 8 - Unassembled standoff

Installation

900285-01 01/2017

Figure 9 - Assembled standoffs

Positioned flat as shipped from the factory

Screw

Fireplace Front

Top Standoff

3. Route the Gas Supply Line to the Fireplace

1. Route a 1/2” (13 mm) gas line to the left side of the fireplace (Figure 10).
NOTE: Gas lines must be routed, assembled, and made of materials that are in strict accordance with local codes and

regulations. All fireplaces are factory-equipped with a flexible gas line connector and a 1/2” shutoff valve (Page 40).

Figure 10 - Routing the gas line - 35”, 40”,

45” Models

Left side front corner of
fireplace framing

Pipe coupling
(recommended)

7-5/8”
(195 mm)

3”

(77 mm)

Configuration for 1/2" finish materials

Top Standoff

Fireplace

Front

Configuration for 5/8" finish materials

Figure10a - Routing the Gas Line - 33” Model

Left side front corner of
fireplace framing

Pipe coupling
(recommended)

5-1/4”
(140 mm)

3”

(77 mm)

Top Standoff

Fireplace

Front

18

Proper Sizing of Gas Line

Properly size and route the gas supply line from the supply regulator to the area where the appliance is to be installed
per requirements outlined in the National Fuel Gas Code, NFPA 54—latest edition (USA) or CAN/CGA-B149.1—latest
edition (Canada).

The gas supply line should not be connected to the appliance until step 14. Connect the Gas Line (Page 40).

NOTE:

• All fireplaces are factory-equipped with a flexible gas line connector and 1/2” shutoff valve (Figure 35).

• See Massachusetts Horizontal Vent Requirements for additional requirements for installations in the state of

Massachusetts in the USA.

• A pipe joint compound rated for gas should be used on the threaded joints. Ensure propane-resistant
compounds are used in propane applications. Be very careful that the pipe compound does not get inside the
pipe.

• A sediment trap in the supply line as close as possible to the fireplace is recommended.

• Check with the local building official for local code requirements (e.g., Are below grade penetrations of the gas
line allowed?, etc).

CAUTION

If propane is used, be aware that with a tank that is too small (i.e., under 100 lbs, if this
is the only gas appliance in the dwelling—see NPFA 58), there may be a loss of pressure.
This can result in insufficient fuel delivery that can cause sooting, delayed ignition, or other
malfunctions. Any damage resulting from an improper installation is not covered by the
limited warranty.

Innovative Hearth Products
Gemini™ and GeminiCD Series Direct-Vent Gas Fireplaces

Determining Vent Setup in the Combination Venting Unit

4.

900285-01 01/2017

Combination venting units are shipped with rear venting setup nearly ready for install. If this is the type of vent you require, remove
all insulation packing and flue plug block off from rear venting and proceed with fireplace installation. If you require a top-vented
unit, use the following steps to convert the fireplace before use.

Outside preparation of the fireplace for top-vent conversion

Installation

Step 1: Remove the eight (8) screws holding the top vent cover

Step 2: Remove the round flue cover from the top venting outlet.

plate and gasket. Discard cover plate and reinstall screws.

Step 3: Remove insulation from inside flue pipe. Step 4: Make sure insulation disc is still in the round cover. Re-

move the flue plug from the top flue.

19

Innovative Hearth Products
Gemini™ and GeminiCD Series Direct-Vent Gas Fireplaces

900285-01 01/2017

Installation

5. Installing Non-Combustible Fireboard Standoff - All Models

A non-combustible standoff board is provided for all model fireplaces to prevent overlap of drywall or other material of portions of the
fireplace that may be prone to the buildup of heat. It is supported by a middle bracket and two side brackets.

Separate and note metal side
(2) and center (1) brackets.

Step 2: Remove the three screws that align with the clearance
screw holes from the top of the unit. Secure the center bracket to
the top center of the fireplace.

Rough in the Electrical Supply, if Needed

5.

Step 1: Remove two screws from the top and side of the unit. Bend the side bracket securing tab
over the edge of the unit and secure. Secure bracket to the top through the clearance screw hole.

Step 3: Top of front fireboard
standoff should be flush with
top standoffs (not shown).

As necessary, rough in the fireplace electrical supply per NEC and local codes.

6. Install the [Optional] Blower Kit before Installation in the Framing

1. Remove the left side blower cover panel screw, and blower cover panel (see Table 12, Page 17). Retain the

panel and screw for later reinstallation.

Step 4: Fireboard standoff can
be secured to the capture screw
holes.

20

2. Slide the blower through the opening and position it with the bracket oriented to the front of the firebox and the

blower discharge to the rear of the firebox. Bend the two tabs in the firebox floor to secure the blower to the
floor.

3. Reinstall the blower cover panel and secure with the removed screw.

4. Access the blower supply wiring through the front of the fireplace and plug it into the junction box in the right,

rear of the fireplace (Figure 32).

5. Install the blower control switch according to its included instructions.

Innovative Hearth Products
Gemini™ and GeminiCD Series Direct-Vent Gas Fireplaces

Place the Fireplace in the Framing and Secure

7.

NOTE: Nailing flanges, combustible members, and screw heads in areas directly adjacent to the nailing flanges are

EXEMPT from the 1/2” clearance to combustible requirements for the firebox outer wrapper.
NOTE: Combustible framing may be in direct contact with the nailing flanges and may be located within 1/2” of screw

heads and the firebox wrapper in areas adjacent to the nailing flanges.
Frame the opening to the exact dimensions specified in the framing details in this manual.

1. Bend out the appropriate nailing flanges for the drywall / finish material to be used (Figure 11). Nailing flanges
are provided for:

• flush framing,

• 1/2”, and

• 5/8” framing depths.

2. Secure the fireplace to the side framing members using the unit’s nailing flanges—one top and bottom on each
side of the fireplace front (Figure 11). Use 8d nails or the equivalent.

Figure 11 - Nailing Flanges

Installation

900285-01 01/2017

Side

framing

Unit nailing flange
(no clearance to combustible
framing is required)

VENT SYSTEM PREPARATION

8. Select a Horizontal or Vertical Vent System

1. With the fireplace secured in the framing, determine the vent route and identify the exterior termination location.

The following sections describe vertical (roof) and horizontal (exterior wall) vent applications. Use only approved
vent components (Page 8 and Pages 48-49).

NOTE: This fireplace must be vented directly to the outside.

The vent system may not service multiple appliances, and must never be connected to a
flue serving a separate solid fuel burning appliance.

NOTE: The vent pipe is tested to be run inside an enclosed wall (such as a chase). There is no requirement for

inspection openings in the enclosing wall at any of the joints in the vent pipe.

WARNING

21

Innovative Hearth Products

2 1/2”

Break-Away

1

3

20

40

6

10

40

25 ft Maximum

horizontal run (flat to near level)

60 ft Maximum vertical run

60

1.9

25

Horizontal Distance (ft)

Vertical Height (ft) from top of unit

Vertical Height (ft)

2

5

Elbow**

5 10

15

3” Base + wing3” Base

6 ft Minimum
vertical run

6 ft Minimum vertical run

None

Gemini™ and GeminiCD Series Direct-Vent Gas Fireplaces

9. Install the Vent Restrictor (if necessary)

1. Use the vent run descriptions in Figure 12 to determine if a vent restrictor is necessary.

2. If necessary, assemble the vent restrictor and wing as detailed in Figures 12 and 15.

3. If necessary, install the appropriate vent restrictor (Figures 13 and 14).

NOTE: If installing the vent restrictor in a rear vent application, ensure the factory-installed intake air baffle is in place (Figure 14).
NOTE: The vent restrictor is shipped in the firebox.

Installation

900285-01 01/2017

Figure 12 - When to use a vent restrictor

***

Figure 13 - Vent restrictor installation, Top vent

*

U-Shaped Vent

Restrictor

Inner

Fireplace

Collar

Appliance Top Vent Outlet

Figure 14 - Vent restrictor installation, Rear vent

Inner Fireplace Collar

Appliance Rear

Vent Outlet

U-Shaped Vent

Restrictor

22

* For straight runs or runs with elbows as illustrated in Vertical Vent Figures/Tables

starting on Page 28
** No rise required.
*** On 33” Models, use the 3” base restrictor. Do not raise the break-away tab.

NOTE: When venting Rear Horizontal with slip collar and termination only, install base
vent restrictor with the breakaway portion raised.

*

Intake Air Baffle

Figure 15 - Vent restrictor assembly

With
break-away
raised***

Base Vent Restrictor

Base Vent Restrictor + Wing

Innovative Hearth Products

SV4.5E90

(90

°

Elbow)

8 1/8 in.

(206 mm)

Swivel Joint

(360

°

swivel)

4 13/16 in.

(122 mm)

SV4.5E45

(45

°

Elbow)

Swivel Joint

(360

°

swivel)

Gemini™ and GeminiCD Series Direct-Vent Gas Fireplaces

Vent Restrictor with Horizontal Terminations

When horizontally terminating a vent system with a vertical vent run up to 4 ft through an exterior wall, no vent
restrictor is required.

If installing more than 4 ft of vertical venting, install the restrictor (Figure 14), from inside or outside the unit, in the
inner fireplace collar. The vent restrictor is held in place by friction.

Connecting the vent pipe

Secure Vent® SV4.5 direct-vent system components are unitized concentric pipe components featuring positive twist
lock connections (Figures 16-17). All of the fireplaces covered in this document are fitted with collars having locking
inclined channels. The dimpled end of the vent components fit over the fireplace/vent collar to create the positive
twist lock connection.

1. Align the dimpled end over the collar, adjusting the radial alignment until the four (4) locking dimples are aligned

with the inlet of the four (4) inclined channels on the collar (Figure 16).

2. Push the vent component against the collar until it fully engages, then twist the component clockwise, running

the dimples down and along the incline channels until they seat at the end of the channels.

NOTE: The unitized design of the Secure Vent

3. If desired, a #6 x 1/2” screw can be used at the joint, but is not required as the pipe will securely lock when

twisted (Figure 17).

Where required, a telescopic vent section (SV4.5LA) may be used to provide the installer with an option to install
in tight and confined spaces, or where the vent run made up of fixed length pieces develops a joint in a undesirable
location, or will not build up to the required length. The SV4.5LA Telescopic Vent Section has an effective length of
from 1-1/2 to 7” (38 to 191 mm). The SV4.5LA is fitted with a locking inclined channel end (identical to a normal
vent section component) and a plain end with three (3) pilot holes. Slip the plain end over the locking channel end of
a standard SV4.5 vent component the required distance and secure with three (3) screws.

Installation

900285-01 01/2017

®

components will engage and seal both the inner and outer vent pipe.

Vent elbows

Figure 16 - Connecting vent

components

Arrow

Dimple

Locking
Incline
Channel

Appliance Collar or
Vent Section

Figure 17 - Connected vent

components

Dimple

Locking

Incline

Channel

Arrow

Figure 18 - Elbow Dimensions

4-13/16”
(122 mm)

Swivel Joint

(360°)

SV4.5E45

(45° elbow)

Swivel Joint

(360°)

SV4.5E90

(90° elbow)

8-1/8”
(206 mm)

Vent elbows are available in 90° and 45° configurations. Refer to Figure 18 for the SV4.5E45 and SV4.5E90 elbow
dimensions. The elbows feature a twist section to allow them to be routed about the center axis of their initial collar
section to align with the required direction of the next vent run element.

1. Rotate the elbow in a clockwise direction (to avoid the possibility of unlocking any of the previously connected
vent sections) for proper alignment (Figure 18). See Connecting the vent pipe for more information.

Table 13 - Effective Vent Length

Model Effective Length

SV4.5L6 4-1/2”
SV4.5L12 10-1/2”
SV4.5L24 22-1/2”
SV4.5L36 34-1/2”
SV4.5L48 46 1/2”

23

Innovative Hearth Products
Gemini™ and GeminiCD Series Direct-Vent Gas Fireplaces

Vent section length table

Table 14 will assist calculating how many vent sections are needed for the planned vent configuration. When a vent
section is engaged with another section, its effective length will be 1-1/2” shorter.

Table 14 - Vent Section Length

24

Nominal Section

Length (in.)

Net Section Length

(in.)

Height of Vent

in. ft in. ft

4.5 0.375 1 0 0 0 0 1 252 21 0 1 0 7 0 8

9 0.75 2 0 0 0 0 2 276 23 0 0 0 8 0 8

10.5 0.875 0 1 0 0 0 1 279 23.25 0 0 0 0 6 6

15 1.25 1 1 0 0 0 2 280.5 23.375 1 0 0 8 0 9

22.5 1.875 0 0 1 0 0 1 289.5 24.125 0 1 0 0 6 7

31.5 2.625 0 3 0 0 0 3 301.5 25.125 0 0 1 0 6 7

34.5 2.875 0 0 0 1 0 1 310.5 25.875 0 0 0 9 0 9

37.5 3.125 1 1 1 0 0 3 325.5 27.125 0 0 0 0 7 7

43.5 3.625 0 2 1 0 0 3 330 27.5 1 0 0 0 7 8

45 3.75 0 0 2 0 0 2 345 28.75 0 0 0 10 0 10

46.5 3.875 0 0 0 0 1 1 349.5 29.125 1 0 0 10 0 11

51 4.25 1 0 0 0 1 2 372 31 0 0 0 0 8 8

55.5 4.625 0 1 2 0 0 3 379.5 31.625 0 0 0 11 0 11

57 4.75 0 0 1 1 0 2 418.5 34.875 0 0 0 0 9 9

67.5 5.625 0 0 3 0 0 3 465 38.75 0 0 0 0 10 10

69 5.75 0 0 0 2 0 2 475.5 39.625 0 1 0 0 10 11

73.5 6.125 1 0 0 2 0 3 480 40 1 1 0 0 10 12

79.5 6.625 0 1 0 2 0 3 492 41 1 0 1 0 10 12

81 6.75 0 0 0 1 1 2 499.5 41.625 0 0 0 1 10 11

91.5 7.625 0 0 2 0 1 3 504 42 1 0 0 1 10 12

93 7.75 0 0 0 0 2 2 511.5 42.625 0 0 0 0 11 11

97.5 8.125 1 0 0 0 2 3 520.5 43.375 0 2 0 1 11 14

103.5 8.625 0 0 0 3 0 3 531

108 9 1 0 0 3 0 4 538.5 44.875 1 0 0 2 11 14

117 9.75 1 0 5 0 0 6 549 45.75 1 0 2 1 11 15

118.5 9.875 1 1 0 3 0 5 558 46.5 0 0 0 0 12 12

126 10.5 0 0 1 3 0 4 562.5 46.875 1 0 0 0 12 13

130.5 10.875 1 0 1 3 0 5 568.5 47.375 0 1 0 0 12 13

135 11.25 0 0 6 0 0 6 573 47.75 1 1 0 0 12 14

139.5 11.625 0 0 0 0 3 3 580.5 48.375 0 0 1 0 12 13

142.5 11.875 1 0 0 4 0 5 589.5 49.125 0 1 2 2 10 15

144 12 1 0 0 0 3 4 595.5 49.625 1 1 1 0 12 15

154.5 12.875 1 1 0 0 3 5 604.5 50.375 0 0 0 0 13 13

160.5 13.375 0 2 0 0 3 5 615 51.25 0 1 0 0 13 14

172.5 14.375 0 0 0 5 0 5 625.5 52.125 0 2 0 0 13 15

177 14.75 1 0 0 5 0 6 631.5 52.625 1 0 1 0 13 15

186 15.5 0 0 0 0 4 4 637.5 53.125 0 1 1 0 13 15

196.5 16.375 0 1 0 0 4 5 651 54.25 0 0 0 0 14 14

207 17.25 0 0 0 6 0 6 655.5 54.625 1 0 0 0 14 15

211.5 17.625 1 0 0 6 0 7 672 56 0 2 0 0 14 16

217.5 18.125 0 1 0 6 0 7 678 56.5 1 0 1 0 14 16

229.5 19.125 0 0 1 6 0 7 688.5 57.375 1 1 1 0 14 17

232.5 19.375 0 0 0 0 5 5 697.5 58.125 0 0 0 0 15 15

241.5 20.125 0 0 0 7 0 7 702 58.5 1 0 0 0 15 16

246 20.5 1 0 0 7 0 8 712.5 59.375 1 1 0 0 15 17

6 12 24 36 48

4.5 10.5 22.5 34.5 46.5 Net Section Length (in.) 4.5 10.5 22.5 34.5 46.5

Number of Vent Sections

Nominal Section Length

Total Qty

Installation

900285-01 01/2017

(in.)

Height of Vent

44.25 0 2 2 0 11 15

720 60 0 0 1 0 15 16

6 12 24 36 48

Number of Vent Sections

Total Qty